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Mirror Formula and Magnification

The combinati...

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The combination of convex lens focal length is equal to 18 cm and I thin concave lens focal length is equal to 9 cm is Options A concave lens f is equal to 18 centimetre A convex lens f is equal to 180 cm A convex lens f is equal to 6 CM A concave lens f is equal to 6 centimetre

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